The amount of matter that makes up the apple ____
	depends upondoes not depend upon

the location of the apple. It has the same resistance to acceleration wherever it is - its inertia everywhere
	the samedifferent

The quantity that doesn't change with location is ____
	massweight

and the quantity that may change with location is its ____.
	massweight

That's because ____ is the force due to gravity on a body, and this force varies with distance.
	massweight

When we refer to the _____ of an object we are usually speaking of the gravitational force that attracts it to the earth.
	massweight

If we stand on a weighing scale and find that we are pulled toward the earth with a force of 500 N, then we weigh ____ N. Strictly speaking, we weigh ____ N relative to the earth. But much does the earth weigh relative to us? If we tip the scale upside down and repeat the weighing process, we can say that we and the earth are still pulled together with a force of ____ N, and therefore, relative to us, the whole 6,000,000,000,000,000,000,000,000-kg earth weighs ____ N! Weight, unlike mass, is a relative quantity.

 

A spaceship is attracted to both a planet and the planet's moon. The planet has four times the mass of its moon. The force of attraction of the spaceship to the planet is shown by the vector.

 

Carefully sketch another vector to show the spaceship's attraction to the moon. Then use the parallelogram method and sketch the resultant force. Describe the direction of the resultant force.

Determine the location between the planet and its moon (along the dotted line) where gravitational forces cancel.
	ABCDE

halfway to the center.

then at the center

Describe the motion you would experience if you fell into the tunnel.

at R/2

at R/10

When the planet has collapsed to 1/10 of its initial radius, a ladder is erected that puts the object as far from its center as the object was originally. Fill in its weight at this position.